comparison of freckles and melasma on skin woman face on white background.

freckles melasma skin hyperpigmentation pigmentation face melanin melanocyte ephelides solar lentigines actinic discoloration complexion woman melanogenesis pigment brown spot dark genetic patch cell menopause dullness epidermis dermis sunburn exposure hormone vector infographic flat design diagram inflammation unhealthy dermatology aging beauty treatment care damage cartoon lesion change ultraviolet light marks childhood concept adulthood appearance 202408comparison comparison isolated white background types